Source:http://linkedlifedata.com/resource/umls/id/C0013849
MSH: Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.,NCI: E-mail is short for "electronic mail" and refers to composing, sending, and receiving messages over electronic communication systems. Most e-mail systems use the Internet.